I have tried using code above and similar from M5Stack repo. I changed the pin assignments to 19 and 22, which works fine on an alt. setup with Atom Lite, Env I hat, and Atom Mate. Using the setup below: Atom Matrix Env II hat Atom Mate I get this error and continuous reset loop. [ 913][W][Wire.cpp:301] begin(): Bus already started in Master Mode. Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled. If I pull out the hat, I get a warning via the code that it is disconnected. I know the origin of this post was from long ago, but I can't think what could be causing it. Is there any difference between Env II unit and Env II hat? Any other thoughts welcome.

Hello @tomtom22 to you first question: it doesn't matter whether you press and hold the reset button to get the M5AtomS3 into download mode to burn firmware or let the automatic do it. The press and hold the reset button method is available in case the automatic download mode fails. This can happen if for instance the currently running firmware has an issue causing the device to constantly reset. I personally let the automatic download mode do its thing and only if that fails use the reset button method. Thanks Felix

Boiled it down to minimalistic piece of code to avoind any sideeffects... Here is a link to 2 different Atom Lite pieces running exactly the same software as shown below. https://photos.app.goo.gl/KBm54aqW5LbtxsWq7 This video shows them side-by-side..... They dow not in any direction behave at least a little bit similar..... Any ideas anyone? This is running on the Atom Lite now: #include <Arduino.h> #include <LiteLED.h> // Choose the LED type from the list below. // #define LED_TYPE LED_STRIP_WS2812 #define LED_TYPE LED_STRIP_SK6812 // #define LED_TYPE LED_STRIP_APA106 // #define LED_TYPE LED_STRIP_SM16703 #define LED_TYPE_IS_RGBW 1 #define LED_GPIO 27 #define LED_BRIGHT 100 static const crgb_t L_RED = 0xff0000; static const crgb_t L_GREEN = 0x00ff00; static const crgb_t L_BLUE = 0x0000ff; static const crgb_t L_WHITE = 0xe0e0e0; LiteLED myLED( LED_TYPE, LED_TYPE_IS_RGBW ); void setup() { myLED.begin( LED_GPIO, 1 ); myLED.brightness( LED_BRIGHT ); } void loop() { myLED.setPixel( 0, L_RED, 1 ); delay( 500 ); myLED.setPixel( 0, L_GREEN, 1 ); delay( 500 ); myLED.setPixel( 0, L_BLUE, 1 ); delay( 500 ); myLED.setPixel( 0, L_WHITE, 1 ); delay( 500 ); }

Update: I confirmed that I can reproduce this issue with the latest version (i.e., v1.12.3). I also tried specifying the SSID and PASSWORD using a Network block but got no luck. Can anybody else reproduce this issue?

@mono-mono go into uiflow2 and change the name by clicking on the device on the bottom of the screen

@mtylerjr I'm already working with alpha 21

So I answered 1] myself (yes, you can power an Atom via the grove power pins) I still would like to know the specs of the different devices, what the minimum current is for operation, with and without bluetooth (obviously using RF would take more power, to transmit) These seem like basic questions for someone trying to incorporate these products into a design - but I can't find any relevant info :(

Thank you very much for your answer. I use Arduino

OK, I just had the same problem and .... is amazing, but the manufacturer Heltec has their libraries on this pcb wrong or at least obsolete. When you put as PCB a "Wireless stick lite" trying to program, but its version is the latest (v3) with an ESP32S3, it shows an error message. Solution, use the expressif PCB library instead of the Haltec library and select the correct board and the problem will be solved.

@teastain said in Atom lite header spacing between the two rows: @gorstj HY2.0-4P. (2mm) as per: https://shop.m5stack.com/products/grove-t-connector-5pcs-a-pack Wrong connector @gorstj said in Atom lite header spacing between the two rows: I am looking to use an Atom Lite within a project I am building a custom PCB (needs to interact with a LIN controller via serial) I assume the two rows of pins on an Atom Lite are standard 2.54mm spacing. (I don't have my Atom Lite yet though!) What is the exact distance between the two rows of female header on the Atom Lite? I can't find it within any of the datasheets? Thanks for any help. Here is a 3D mockup of my PCB - obviously the header has to be exactly the correct width. [image: 1685091376556-pcb-resized.png] The pins are indeed normal headers and the spacing of the headers is 7 header pins from one side to the other centre to centre with the equivalent of 5 unused header pins between them. (sorry hard to describe as the battery in my calibers has died). @teastain is describing the grove connector on the bottom not the back.